https://uomosul.edu.iq/libcentral/%d9%86%d8%b5%d9%8a%d8%ad%d8%a9-%d8%b7%d8%a8%d9%8a%d8%a8-%d8%a7%d9%86%d8%af%d9%84%d8%b3%d9%8a-%d9%85%d9%86-%d8%a7%d9%84%d9%82%d8%b1%d9%86-%d9%a8-%d9%87%d8%ac%d8%b1%d9%8a-%d9%a1%d9%a4-%d9%85%d9%8a/